MULTI-LAYER EXTRAORDINARY OPTICAL TRANSMISSION FILTER SYSTEMS, DEVICES, AND METHODS

摘要

Systems, devices, and methods for an extraordinary optical transmission (EOT) image capture system comprising optical components to capture light corresponding to an object, an EOT filter device to receive the captured light and transmit wavelengths of interest, and an image sensor to receive the wavelengths of interest and capture an image corresponding to the object. The EOT filter device comprising a first EOT film with thickness TEOT1 and including upper and lower surfaces and a plurality of apertures having a pitch P1, a second EOT film with thickness TEOT2 and including upper and lower surfaces and a plurality of apertures having a pitch P2; and an optical cavity disposed between the first and second EOT films, the optical cavity having a thickness TOC and a refractive index RIOC, wherein the EOT filter device transmits wavelengths of interest based on thicknesses TEOT1 and TEOT2, pitches P1 and P2, and thickness TOC.

主权项

1. An extraordinary optical transmission (EOT) imaging system comprising:
one or more lenses; an EOT filter device configured to receive light from the one or more lenses, the EOT filter device comprising:
a first EOT film having a first EOT film thickness TEOT1, the first EOT film including:
a first upper surface,a first lower surface, anda plurality of first apertures having a first aperture width smaller than wavelengths of the light received from the one or more lenses, the first apertures spaced at a first pitch P1 such that the first EOT film is configured to transmit via extraordinary optical transmission a portion of the light received from the one or more lenses that falls within a first frequency bandwidth and substantially prevent transmission of a second portion of the light received from the one or more lenses that falls outside the first frequency bandwidth;a second EOT film having a second EOT film thickness TEOT2, the second EOT film including:
a second upper surface,a second lower surface, anda plurality of second apertures having a second aperture width smaller than the wavelengths of the light received from the one or more lenses, the second apertures spaced at a second pitch P2; andwherein the first and second EOT films form an optical cavity having a thickness TOC, which is measured from the first lower surface to the second upper surface, and a refractive index RIOC, wherein an optical path length of light through the optical cavity is a function of the optical cavity thickness TOC and the refractive index RIOC,wherein the optical cavity is configured to cause destructive interference of the first portion of the light transmitted through the first EOT film so that only a part of the first portion of the light is transmitted through the second EOT film, the part of the first portion of the light transmitted through the second EOT film having a second frequency bandwidth within and less than the first frequency bandwidth; and an image sensor configured to receive and sense the part of the first portion of the light transmitted through the second EOT film to capture an image corresponding to the light received from the one or more lenses.